771721874353 has 2 divisors, whose sum is σ = 771721874354. Its totient is φ = 771721874352.

The previous prime is 771721874347. The next prime is 771721874369. The reversal of 771721874353 is 353478127177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 720244163584 + 51477710769 = 848672^2 + 226887^2 .

It is a cyclic number.

It is not a de Polignac number, because 771721874353 - 2²⁹ = 771185003441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 771721874294 and 771721874303.

It is not a weakly prime, because it can be changed into another prime (771721874323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385860937176 + 385860937177.

It is an arithmetic number, because the mean of its divisors is an integer number (385860937177).

Almost surely, 2^771721874353 is an apocalyptic number.

It is an amenable number.

771721874353 is a deficient number, since it is larger than the sum of its proper divisors (1).

771721874353 is an equidigital number, since it uses as much as digits as its factorization.

771721874353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6914880, while the sum is 55.

The spelling of 771721874353 in words is "seven hundred seventy-one billion, seven hundred twenty-one million, eight hundred seventy-four thousand, three hundred fifty-three".